2015
DOI: 10.1118/1.4924166
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SU-E-J-79: Evaluation of Prostate Volume Changes During Radiotherapy Using Implanted Markers and On-Board Imaging

Abstract: Purpose: To evaluate prostate volume changes during radiation therapy using implanted gold markers and on‐board imaging. Methods: Twenty‐five patients were included who underwent an implantation of three gold markers. Cartesian coordinates of markers were assessed in kV‐images. The coordinates of centers of two markers were measured on kV‐images from the center of the marker at the apex which was reference. The distances between the markers were extrapolated from the coordinates using the Euclid formula. The r… Show more

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